HALHF Monthly Accelerator Meeting

Monday 7 Jul 2025, 16:00 → 18:00 Europe/Berlin

https://zoom.us/j/6109509558?omn=94145342100

Brian Foster (Oxford/DESY)

16:00 → 16:10 Introduction

Speaker: Brian Foster (Oxford/DESY)

16:10 → 16:30 Report on discussions at Venice EPPSU Open Symposium

Speakers: Erik Adli (Oslo), Prof. Richard D'Arcy (Oxford)

16:30 → 17:30 Forward Look by each Working Group

Speaker: Brian Foster (None)

• Physics and Detectors (D1):
  • priority topics:
    1. produce beam spectra for the new baseline, for sqrt(s) = 250 GeV, but also for 550 GeV (e.g. as HALHF-like upgrade of conventional symmetric 250 GeV LC)
    2. update the Higgs recoil plot, and possibly make the analysis a bit more complete (backgrounds, signal fit etc, SGV-based)
    3. assess systematic uncertainties on forward-backward asymmetries and compare sys. and asym. case (SGV-based, 250 GeV or Z pole?)
    4. assess impact of asymmetric collisions on a 550 GeV flagship analysis, e.g. ZHH (synergies with ongoing symmetric study, SGV-based)
    5. assess impact on LLP searches 
              "micro-displaced vertices" / HNLs@Z pole 
    6. threshold scan (tt or WW or ...)
  • person power
    • 2 (partial) PhD students with Matthew/Jenny, Sinead trying to find person power (fraction postdoc / project students / ...)
    • write brief synopsis on eachof the topics above, to provide better idea of scope / skills needed etc pp

17:30 → 17:40 AoB

Speaker: Brian Foster (Oxford/DESY)